The application of Global Position System ( GPS ), which is characterized by high precision all weather, global cover capability in contrast to that of other navigation device, carried out the revolution in electronic navigation field. 全球定位系统(GPS)带来了电子导航领域的一场革命,它具有的高精度、全天候、全球覆盖能力等诸多优点是其他导航设备无可比拟的。